GSD offers 2 types upgraded IPL. Square Pulse IPL supported by constant current technology, ensures energy can acheive peak power during the entire pulse duration, which guarantee energy output always uniform and stable. With its RVC function, also ensures accurate fluence to reach presetting energy without any sudden energy attenuation. PTF provides a comfortable and safer treatment than tranditional IPL, it releases relatively low energy with long pulse acts on skin gradually, while traditional IPL has sharp pulse and high energy which might burn skin.